{"schemaVersion":3,"id":"USN-4551-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"squid3 vulnerabilities\n\nAlex Rousskov and Amit Klein discovered that Squid incorrectly handled\ncertain Content-Length headers. A remote attacker could possibly use this\nissue to perform an HTTP request smuggling attack, resulting in cache\npoisoning. (CVE-2020-15049)\n\nAmit Klein discovered that Squid incorrectly validated certain data. A\nremote attacker could possibly use this issue to perform an HTTP request\nsmuggling attack, resulting in cache poisoning. (CVE-2020-15810)\n\nRégis Leroy discovered that Squid incorrectly validated certain data. A\nremote attacker could possibly use this issue to perform an HTTP request\nsplitting attack, resulting in cache poisoning. (CVE-2020-15811)\n\nLubos Uhliarik discovered that Squid incorrectly handled certain Cache\nDigest response messages sent by trusted peers. A remote attacker could\npossibly use this issue to cause Squid to consume resources, resulting in a\ndenial of service. (CVE-2020-24606)","dates":{"published":"2020-09-28T16:41:05.000Z","modified":"2026-02-10T04:41:56.000Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":null,"severity":"unknown","version":null,"versionLabel":null,"source":null,"vector":null,"computed":false,"selection":"none"},"metrics":[]},"epss":{"probability":null,"percentile":null,"severity":"unknown","asOf":null,"change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[],"last30":[]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[],"affected":[{"vendor":"ubuntu","product":"squid3","name":"squid3","label":"squid3","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/squid3","purlType":"deb","versions":[{"text":"< 3.5.12-1ubuntu7.15","noFixRecorded":false,"fixedIn":null},{"text":"< 3.5.27-1ubuntu1.9","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 3.5.12-1ubuntu7.15 | < 3.5.27-1ubuntu1.9","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-4551-1","label":"ubuntu.com/security/notices/USN-4551-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2020-15049","label":"ubuntu.com/security/CVE-2020-15049","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-15810","label":"ubuntu.com/security/CVE-2020-15810","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-15811","label":"ubuntu.com/security/CVE-2020-15811","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-24606","label":"ubuntu.com/security/CVE-2020-24606","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":["CVE-2020-15049","CVE-2020-15810","CVE-2020-15811","CVE-2020-24606"],"downstream":[],"duplicates":[],"related":["CVE-2020-15049","CVE-2020-15810","CVE-2020-15811","CVE-2020-24606"]},"timeline":[{"kind":"published","date":"2020-09-28T16:41:05.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-02-10T04:41:56.000Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":0,"level":"minimal","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T04:07:47.191Z","stale":false,"partial":false}}